Collapsible water tank



FIG. 1 is an isometric view of an embodiment of a collapsible water tank with a lid;

FIG. 2 is a front view of the collapsible water tank of FIG. 1;

FIG. 3 is a rear view of the collapsible water tank of FIG. 1;

FIG. 4 is a left-side view of the collapsible water tank of FIG. 1;

FIG. 5 is a right-side view of the collapsible water tank of FIG. 1;

FIG. 6 is a top view of the collapsible water tank of FIG. 1; and,

FIG. 7 is a bottom view of the collapsible water tank of FIG. 1.

The broken line showing is included for the purpose of illustrating and forms no part of the claimed design. 

CLAIM The ornamental design for a collapsible water tank, as shown and described. 